Dayton Audio MB820-8

Mid Bass

8″ / 209 mm
Nominal diameter
69 Hz
Resonance
0.46
Q factor
93 dB
Sensitivity
± 4 mm
Linear excursion
400 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
92.6
dB
Frequency response
100 - 7500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
69.0
Hz
Mechanical quality factor
QMS
3.83
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.46

Large signal parameters

Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
98
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
1.04
mH
VC Diameter
51
mm
Winding material
CCA

Magnet

Force factor
Bl
9.6
N/A
Motor constant
Bl/√RE
4.19
N/√W
Weight
1.077
kg
Material
Ferrite

Diaphragm

Effective diameter
176
mm
Effective area
SD
244
cm²
Moving mass
MMS
20.9
g
Moving mass (without air load)
MMD
18.2
g
Material
Paper

Suspensions

Stiffness
KMS
3.97
N/mm
Compliance
CMS
252
µm/N
Equivalent volume to the compliance
VAS
15.8
L
Mechanical resistance
RMS
2.37
N·s/m
Surround material
Cloth

Dimensions

Nominal diameter
8
209
mm
Overall diameter
209
mm
Baffle cutout diameter
181
mm
Overall depth
91
mm
Volume occupied by the driver (estimated)
0.77
L
Frame material
Steel
Dayton Audio MB820-8 Impedance
Dayton Audio MB820-8 SPL

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fS
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SD
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65 - 18000 Hz
QTS
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xmax
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Bl/√RE
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Pmax
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